Method and device for detecting peak values of pressure in a cylinder of an internal combustion engine

摘要

A simple and effective method and a related device for detecting a pressure peak value during a pressure cycle in a cylinder of an internal combustion engine is proposed. An accelerometer is installed on the engine body for sensing vibrations of the engine during its functioning and a band-pass replica of the output acceleration signal is compared with a threshold and an active logic flag is generated when the threshold is exceeded. The band-pass filtered replica of the acceleration signal is obtained by filtering out frequency components smaller than about 1 kHz and larger than about 2 kHz.